<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            v-model="queryInfo.query"
            placeholder="请输入需要搜索的用户名"
            clearable
            @clear="getUserList"
          >
            <el-button
              @click="getUserList"
              slot="append"
              icon="el-icon-search"
            ></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button @click="addDialogVisible = true" type="primary">
            添加用户
          </el-button>
        </el-col>
      </el-row>
      <!-- 用户列表区域 -->
      <el-table :data="userList" border stripe fit>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <!-- 作用域插槽 -->
          <template slot-scope="scope">
            <el-switch
              v-model="scope.row.mg_state"
              active-color="#13ce66"
              inactive-color="#ff4949"
              @change="userStateChanged(scope.row)"
            ></el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作" width="175px">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
            ></el-button>
            <!-- 删除按钮 -->
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="deleteUserById(scope.row.id)"
            ></el-button>
            <!-- 分配角色按钮,带按钮功能提示 -->
            <el-tooltip
              class="item"
              effect="dark"
              content="分配角色"
              placement="top"
              :enterable="false"
            >
              <el-button
                size="mini"
                type="info"
                icon="el-icon-setting"
                @click="assignRoles(scope.row)"
              ></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
      <!-- 添加用户对话框 -->
      <el-dialog
        title="添加用户"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
      >
        <!-- 内容主题区域 -->
        <el-form
          :model="addForm"
          :rules="formRules"
          ref="addFormRef"
          label-width="70px"
        >
          <el-form-item label="用户名" prop="username">
            <el-input v-model="addForm.username"></el-input>
          </el-form-item>
          <el-form-item label="密码" prop="password">
            <el-input type="password" v-model="addForm.password"></el-input>
          </el-form-item>
          <el-form-item label="手机号" prop="mobile">
            <el-input v-model="addForm.mobile"></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="addForm.email"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑用户对话框 -->
      <el-dialog
        title="编辑用户"
        :visible.sync="edidDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <span slot="footer" class="dialog-footer">
          <!-- 内容区域 -->
          <el-form
            :model="editForm"
            :rules="formRules"
            ref="editFormRef"
            label-width="70px"
          >
            <el-form-item label="用户名">
              <el-input v-model="editForm.username" :disabled="true"></el-input>
            </el-form-item>
            <el-form-item label="手机号" prop="mobile">
              <el-input v-model="editForm.mobile"></el-input>
            </el-form-item>
            <el-form-item label="邮箱" prop="email">
              <el-input v-model="editForm.email"></el-input>
            </el-form-item>
          </el-form>
          <el-button @click="edidDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="edidUser">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 分配角色的对话框 -->
      <el-dialog
        title="分配角色"
        :visible.sync="setRoleDialogVisible"
        width="50%"
        @close="setRoleDialogClosed"
      >
        <div>
          <p>当前用户名: {{ userInfo.username }}</p>
          <p>当前角色: {{ userInfo.role_name }}</p>
          <p>
            分配新角色:
            <el-select v-model="selectedRoleId" placeholder="请选择">
              <el-option
                v-for="item in rolesList"
                :key="item.id"
                :label="item.roleName"
                :value="item.id"
              ></el-option>
            </el-select>
          </p>
        </div>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRoleDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="setRole">
            确 定
          </el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    // 验证邮箱的规则
    var checkEmail = (rule, value, cb) => {
      // 验证邮箱的正则
      const regEmail = /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/
      if (regEmail.test(value)) {
        return cb()
      }
      cb(new Error('邮箱格式不正确!'))
    }
    // 验证手机号的规则
    var checkMobile = (rule, value, cb) => {
      // 验证手机号码的正则
      const regMobile = /^[1][3,4,5,7,8][0-9]{9}$/
      if (regMobile.test(value)) {
        return cb()
      }
      cb(new Error('手机号码格式不正确!'))
    }
    return {
      queryInfo: {
        query: '',
        // 当前页码
        pagenum: 1,
        // 每页显示的条数
        pagesize: 2
      },
      userList: [],
      // 总条数
      total: 0,
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      addForm: {
        username: '',
        password: '',
        mobile: '',
        email: ''
      },
      // 表单验证规则
      formRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
        ],
        mobile: [
          { required: true, message: '请输入手机号', trigger: 'blur' },
          { validator: checkMobile, trigger: 'blur' }
        ],
        email: [
          { required: true, message: '请输入邮箱', trigger: 'blur' },
          { validator: checkEmail, trigger: 'blur' }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      edidDialogVisible: false,
      // 保存获取到的编辑用户的信息
      editForm: {},
      // 控制分配权限对话框的显示与隐藏
      setRoleDialogVisible: false,
      // 待分配角色的用户信息
      userInfo: {},
      // 角色列表
      rolesList: [],
      // 已选择的角色id
      selectedRoleId: ''
    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    // 获取用户列表
    async getUserList() {
      const { data: res } = await this.$http.get('users', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败!')
      }
      this.userList = res.data.users
      this.total = res.data.total
    },
    // 监听 pagesize 改变的事件
    handleSizeChange(newPageSize) {
      this.queryInfo.pagesize = newPageSize
      this.getUserList()
    },
    // 监听 当前页码值 改变的事件
    handleCurrentChange(newCurrentPage) {
      this.queryInfo.pagenum = newCurrentPage
      this.getUserList()
    },
    // 监听 switch开关 用户状态改变
    async userStateChanged(userInfo) {
      const { data: res } = await this.$http.put(
        `users/${userInfo.id}/state/${userInfo.mg_state}`
      )
      if (res.meta.status !== 200) {
        userInfo.mg_state = !userInfo.mg_state
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
    },
    // 点击按钮 添加新用户
    async addUser() {
      // 点击确定按钮前对表单进行预校验
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        // 发起请求添加用户
        const { data: res } = await this.$http.post('users', this.addForm)
        if (res.meta.status !== 201) {
          return this.$message.error(res.meta.msg)
        }
        this.$message.success(res.meta.msg)
        // 隐藏添加用户对话框
        this.addDialogVisible = false
        // 重新获取用户列表
        this.getUserList()
      })
    },
    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },
    // 监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 点击编辑按钮显示编辑用户的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户信息失败')
      }
      this.editForm = res.data
      this.edidDialogVisible = true
    },
    // 点击按钮 编辑用户信息并提交
    edidUser() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        // 发起修改用户的请求
        const { data: res } = await this.$http.put(
          'users/' + this.editForm.id,
          this.editForm
        )
        if (res.meta.status !== 200) {
          return this.$message.error(res.meta.msg)
        }
        // 隐藏编辑用户对话框
        this.edidDialogVisible = false
        // 重新获取用户列表
        this.getUserList()
        this.$message.success(res.meta.msg)
      })
    },
    // 点击删除确认按钮, 删除用户
    async deleteUserById(id) {
      // 弹框确认是否删除, 如果点击确认,返回字符串:confirm
      // 如果点击取消按钮,返回字符串:cancel
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 如果返回的字符串不是confirm,说明用户点击了取消按钮
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // 调用删除用户接口,执行删除操作
      const { data: res } = await this.$http.delete('users/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      // 重新获取用户列表
      this.getUserList()
    },
    // 分配权限
    async assignRoles(userInfo) {
      this.userInfo = userInfo
      // 获取所有角色列表
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.rolesList = res.data
      // 展示对话框
      this.setRoleDialogVisible = true
    },
    // 分配角色
    async setRole() {
      if (!this.selectedRoleId) {
        return this.$message.error('请选择要分配的角色!')
      }
      const { data: res } = await this.$http.put(
        `users/${this.userInfo.id}/role`,
        {
          rid: this.selectedRoleId
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('角色分配失败!')
      }
      this.getUserList()
      this.setRoleDialogVisible = false
    },
    // 监听分配角色对话框的关闭事件
    setRoleDialogClosed() {
      this.selectedRoleId = ''
    }
  }
}
</script>

<style lang="less" scoped></style>
